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Re: Comparisons and decorations, part 2

Dan Zuras Intervals wrote:


	Then let me suggest that there exist a
	decoration for empty.

	Or, at least, some combination of the
	existing decorations that implies empty.

	That way we do not NEED a representation
	for empty within the interval part of a
	1788 interval.

	And we will have anything + empty = empty
	fall out to be both fast & easy no matter
	what we use for empty so long as the
	decoration makes it so.


Since bare[1,1]/bare[0,0] or sqrt(bare[-2,-1]) must be empty,
this conflicts with the need of a fast mode for arithmetic
operations for bare intervals.


Arnold Neumaier